EP 0543057 A1 19930526 - Method for determining the oil content in oil-in-water emulsions.
Title (en)
Method for determining the oil content in oil-in-water emulsions.
Title (de)
Verfahren zur Bestimmung des Ölgehaltes von Öl-in-Wasser-Emulsionen.
Title (fr)
Procédé de détermination de la teneur en huiles des émulsions d'huile dans l'eau.
Publication
Application
Priority
EP 91203043 A 19911120
Abstract (en)
The invention relates to a method for determining the oil content of oil-in-water emulsions generally containing 1-10% w/w of oil. This method is characterized by introducing an indicator in the oil phase - prior to its use in the oil-in-water emulsion - and subsequently determining the oil concentration after or during the use of the oil-in-water emulsion in a spectrophotometrical way. The indicators, suitable for use in the method according to the invention are a.o. the generally known acid/base indicators and the fluorescent indicators. The amount of indicator may vary between wide limits but lies preferably in the range of 10-500 ppm of indicator based on the oil of the oil-in-water emulsion. The data obtained with the spectrophotometrical analysis are compared with calibration curves for the system used, giving the concentration of the oil in the oil-in-water emulsion. <IMAGE>
IPC 1-7
IPC 8 full level
G01N 33/18 (2006.01)
CPC (source: EP)
G01N 33/1833 (2013.01)
Citation (search report)
- [X] EP 0120641 A2 19841003 - SUN TECH INC [US]
- [X] US 4288402 A 19810908 - ELLIS LEONARD C
- [A] EP 0078544 A1 19830511 - LUCAS IND PLC [GB]
- [A] US 4659676 A 19870421 - RHYNE JR RICHARD H [US]
- [A] US 3811837 A 19740521 - HOFFMAN J
- [A] EP 0149125 A2 19850724 - THIOKOL MORTON INC [US]
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 91203043 A 19911120